Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
  • C09B67/0071—Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
  • C09B67/0084—Dispersions of dyes
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
  • C09B67/0033—Blends of pigments; Mixtured crystals; Solid solutions
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
  • C09B67/0033—Blends of pigments; Mixtured crystals; Solid solutions
  • C09B67/0034—Mixtures of two or more pigments or dyes of the same type
  • C09B67/0038—Mixtures of anthraquinones

Definitions

• This invention relates to pigment dipersants and pigment compositions using the same.
• An object of the present invention is, therefore, to provide a pigment dispersant, which upon production of printing inks (offset inks, gravure inks and the like), various paints, plastics, pigment-type textile printing agents, dry or wet toners for electrophotography, inks for ink-jet recording, inks for thermal transfer recording, inks for writing instruments, colorants for color filters, and the like, prevents flocculation of dispersed pigment particles and permits the production of these inks and the like with excellent flow property and high stability.
• a pigment dispersant (hereinafter simply called “dispersant” ), which comprises a compound represented by the following formula (I) or (II) or a metal, ammonium or amine salt thereof:
• X i is a hydrogen atom, a halogen atom, or an alkyl or acylamino group which may be unsubstituted or substituted by at least one atom or group selected from the group consisting of halogen atoms, alkyl groups and an acylamino group
• Y 1 is an anthraquinonylamino, phenylamino, naphthylamino or phenoxy group which may be unsubstituted or substituted by at least one atom or group selected from the group consisting of halogen atoms, alkyl groups and an acylamino group
• R 1 is a hydrogen atom or a substituted or unsubstituted alkyl or phenyl group
• R 2 is a substituted or unsubstituted alkylene, phenylene or naphthylene group
• X 2 is a hydrogen atom, a halogen atom, or a substituted or unsubstituted alkyl group
• R 3 is a hydrogen atom or a substituted or unsubstituted alkyl or phenyl group
• R 4 is a substituted or unsubstituted phenyl or naphthyl group
• n means an average number of sulfonic acid groups introduced in said compound and stands for a number of from 0.5 to 2.
• a pigment composition for example, a colorant for gravure inks, paints or color filters, which comprises a pigment and the above-described dispersant.
• the dispersant of the present invention is useful for dispersing various pigments, which include organic pigments and inorganic pigments, in vehicles for a variety of applications such as printing inks (offset inks, gravure inks and the like), various paints, plastics, pigment-type textile printing agents, dry or wet toners for electrophotography, inks for ink-jet recording, inks for thermal transfer recording, inks for writing instruments and inks for color filters.
• the dispersant of the present invention can significantly improve the flow property of inks, paints and the like, can prevent flocculation of pigment particles, and hence, can provide colored articles which show excellent gloss and vividness.
• the dispersant according to the present invention features in the inclusion of a yellow to reddish purple anthraquinonylaminotriazine structure in its structure. It has excellent compatibility with various pigments, and is usable for dispersing a variety of pigments. Owing to its excellent pigment dispersing effect, the dispersant according to the present invention can also be used for the production of colorants which are useful in various applications.
• the dispersant according to the present invention can be produced by a process disclosed, for example, in JP 46-33232 B, JP 46-33233 B or JP 46-34518 B or by a similar process.
• the dispersant represented by the formula (I) can be obtained by reacting 1 mole of a substituted or unsubstituted 1-aminoanthraquinone, 1 mole of one of a substituted or unsubstituted aniline, a substituted or unsubstituted phenol or a substituted or unsubstituted 1-aminoanthraquinone, and 1 mole of cyanuric chloride at 130° C. to 170° C. for 2 to 6 hours in an inert solvent such as o-dichlorobenzene and further reacting 1 mole of an aliphatic or aromatic amine, which contains one sulfonic acid group per molecule, at 150° C. to 170° C. for 3 to 4 hours.
• the dispersant presented by the formula (II), on the other hand, can be obtained by reacting 2 moles of a substituted or unsubstituted 1-aminoanthraquinone and 1 mole of cyanuric chloride at 130° to 170° C. for 2 to 6 hours in an inert solvent such as o-dichlorobenzene, further reacting 1 mole of an aromatic amine, which does not contain any sulfonic acid group, at 150° C. to 170° C. for 3 to 4 hours, and then sulfonating the reaction product with a sulfonating agent such as fuming sulfuric acid.
• a sulfonating agent such as fuming sulfuric acid.
• Examples of the aliphatic amine or aromatic amine, which contains one sulfonic acid group per molecule and is useful for the production of the compound of the formula (I), can include taurine, N-methyltaurine, o-aminobenzenesulfonic acid, m-aminobenzenesulfonic acid, sulfanilic acid, 4-chloroaniline-3-sulfonic acid, 2-nitroaniline-4-sulfonic acid, 2-aminophenol-4-sulfonic acid, o-anisidine-5-sulfonic acid, p-anisidine-5-sulfonic acid, o-toluidine-4-sulfonic acid, m-toluidine-4-sulfonic acid, p-toluidine-2-sulfonic acid, 2-chloro-p-toluidine-3-sulfonic acid, 3-amino-6-chloro-4-sulfobenzoic acid, 1-amino-8-naphthalene
• aromatic amine useful for the production of the compound of the formula (II) can include aniline, N-methylaniline, toluidine (o-, m- or p-), anisidine (o-, m- or p-), chloroaniline (o-, m- or p-), diphenylamine, 1-naphthylamine and 2-naphthylamine.
• Illustrative of the metal which may form the metal salt with the compound represented by the formula (I) or (II), are alkali metals such as Li, Na and K; and multivalent metals such as Ca, Ba, Al, Mn, Sr, Mg and Ni.
• the dispersant may be added in a proportion of from 0.05 to 40 parts by weight, preferably from 0.1 to 10 parts by weight per 100 parts by weight of the pigment. If the dispersant is added in an unduly low proportion, the intended effect of the dispersant cannot be fully brought about. Even if the dispersant is added in an excessively high proportion, the effect of the dispersant cannot be obtained so much as its proportion. On the contrary, use of the resulting pigment composition leads to paints or inks with reductions in the physical properties of their vehicles, and due to the color of the dispersant itself, the hues of the dispersed pigments are substantially modified.
• pigments can include organic pigments such as azo pigments, phthalocyanine pigments, quinacridone pigments, anthraquinone pigments, dianthraquinonyl pigments, isoindolinone pigments, perylene/perionone pigments, dioxazine pigments, indanthrone pigments, flavanthrone pigments, anthanthrone pigments, pyranthrone pigments, diketopyrrolopyrrole pigments, vat-dye pigments and basic-dye pigments; and inorganic pigments such as titanium oxide, carbon black, Prussian blue, ultramarine, red iron oxide, iron black, zinc white, chrome yellow and composite oxide pigments.
• organic pigments such as azo pigments, phthalocyanine pigments, quinacridone pigments, anthraquinone pigments, dianthraquinonyl pigments, isoindolinone pigments, perylene/perionone pigments, diox
• the pigment and dispersant are mixed together beforehand by a known method, and the resulting pigment composition is added to a vehicle or the like to disperse the pigment in the vehicle or the like.
• the pigment and dispersant are separately added in predetermined proportions to a vehicle or the like to disperse the pigment and dispersant in the vehicle or the like.
• the dispersant is added in a predetermined proportion to disperse the pigment.
• the pigment composition which contains the dispersant according to the present invention can be produced by mixing the pigment and the dispersant together in accordance with one of various methods known to date, and no particular limitation is imposed on its production method.
• Illustrative production methods can include: to mix powder of the pigment and powder of the dispersant without using any disperser; to mechanically mix the pigment and dispersant in one of various dispersers, such as a kneader, roll, or attritor; to add and mix a solution, in which the dispersant according to the present invention has been dissolved or finely dispersed, to and with a suspension of the pigment in water or an organic solvent such that the dispersant is allowed to uniformly deposit on surfaces of the pigment; and to dissolve the pigment and dispersant in a solvent having strong dissolving power such as sulfuric acid, and then to have both of the pigment and dispersant coprecipitated with a poor solvent such as water.
• the dispersant may be used in any one of solution, slurry, paste and powder forms upon preparation of the pigment composition. Whichever form the dispersant is used in, the effects of the present invention can be brought about.
• dispersants according to the present invention can be used either singly or in combination and moreover, can be used in combination with one or more of conventionally known dispersants, for example, rosin, high molecular dispersants, surfactants, and pigment derivatives with polar groups introduced therein.
• conventionally known dispersants for example, rosin, high molecular dispersants, surfactants, and pigment derivatives with polar groups introduced therein.
• the pigment composition according to the present invention can be used as a colorant in various applications such as printing inks (offset inks, gravure inks and the like), various paints, plastics, pigment-type textile printing agents, dry or wet toners for electrophotography, inks for ink-jet recording, inks for thermal transfer recording, inks for writing instruments, and colorants for color filters.
• the pigment composition according to the present invention is particularly useful as a colorant for color filters in each of which a pigment is required to be dispersed to high degree.
• a colorant for color filters is produced by dispersing a pigment to high degree, for example, in a varnish of a photosensitive resin, such as a photosensitive polyacrylate resin, photosensitive polyamide resin, photosensitive polyimide resin or unsaturated polyester resin, or in a varnish obtained by adding a monomer as a reactive diluent to the varnish of the photosensitive resin.
• a photosensitive resin such as a photosensitive polyacrylate resin, photosensitive polyamide resin, photosensitive polyimide resin or unsaturated polyester resin
• a varnish obtained by adding a monomer as a reactive diluent to the varnish of the photosensitive resin.
• JP 10-338832 A discloses use of a pigment as a colorant for color filters by adding a pigment derivative and a cationic high molecular dispersant to the pigment.
• Use of the dispersant according to the present invention in place of the pigment derivative makes it possible to produce a colorant for color filters, said colorant featuring high dispersion stability of the pigment and also high
• That compound (94 parts) was then added to 5% fuming sulfuric acid (800 parts) at 10° C. or lower, followed by a reaction at 30° C. for 5 hours.
• the reaction mixture was allowed to cool down and was then caused to precipitate in iced water (2,500 parts).
• the filtrate was collected by filtration and was then washed with water, whereby the following dispersant (C) (102 parts) was obtained.
• dispersant (C) 102 parts
• gravure inks of the following formula (1) were prepared.
• Dispersant-free polyamide gravure inks were prepared by repeating the procedures of Examples 1 and 2 likewise except that the dispersant was not used and C.I. Pigment Red 146 was used in a proportion of 10.0 parts.
• C.I. Pigment Red 146 (19.0 parts) was added to and dispersed in water (1,000 parts), whereby a slurry was formed.
• Added to the slurry was another slurry which had been prepared by dispersing the dispersant (A) (1.0 part) obtained in Synthesis Example 1 and caustic soda (0.1 part) in water (50 parts).
• the thus-mixed slurry was heated to 70° C., and its pH was adjusted to 4 to 5. After stirred for 20minutes, the slurry was filtered to collect solid matter. The solid matter was dried and then ground, whereby a pigment composition (1) (19.9 parts) according to the present invention was obtained.
• a polyamide gravure ink (1) was prepared in a similar manner as in Example 1 except that the pigment and dispersant in the formula (1) for Examples 1 and 2 were replaced in their entirety by the above-described pigment composition (1) (10.0 parts)
• Example 3 Procedures of Example 3 were repeated likewise except that the dispersants (B) and (C) obtained in Synthesis Examples 2 and 3 were used, respectively, in place of the dispersant (A), whereby pigment compositions (2) and (3) were obtained.
• Polyamide gravure inks (2) and (3) were prepared in a similar manner as in Examples 1 and 2 except that the pigment and dispersant in the formula (1) for Examples 1 and 2 were replaced in their entirety by the above-described pigment compositions (2) and (3) (10.0 parts), respectively.
• Pigment compositions (4) and (5) were obtained by repeating the procedures of Example 3 likewise except that C.I. Pigment Red 245, a diketopyrrolopyrrole pigment, was used instead of C.I. Pigment Red 146 and the dispersants (B) and (C) were used, respectively.
• Pigment compositions (6) and (7) were obtained by repeating the procedures of Example 3 likewise except that C.I. Pigment Green 36, a copper phthalocyanine green pigment, was used instead of C.I. Pigment Red 146 and the dispersants (B) and (C) were used, respectively.
• urethane gravure inks of the following formula (2) were prepared by using the above pigment compositions (4) to (7), respectively.
• Pigment compositions (8) to (10) were obtained by repeating the procedures of Example 3 likewise except that C.I. Pigment Red 177 was used instead of C.I. Pigment Red 146 and the dispersants (A), (B) and (C) were used as dispersants, respectively.
• paints of the following formula (3) were prepared by using those pigment compositions (8) to (10), respectively.
• the above components were placed in a container and subsequent to addition of glass beads, were dispersed by a paint conditioner. In this manner, the paints were prepared.
• a dispersant-free paint was prepared by repeating the procedures of Example 10 likewise except that in place of 10.0 parts of the pigment composition (8), C.I. Pigment Red 177 was used in a proportion of 10.0 parts.
• Tinted paints were prepared by diluting the paints of Examples 10 to 12 to a concentration of one tenth with a white paint, which had been prepared using titanium oxide, respectively. The tinted paints were observed for possible flocculation of the pigment. However, flooding, settling or the like of the pigment was not observed.
• color filter colorants of the following formula (4) were prepared by using the pigment compositions (9) and (10), respectively.
• the above components were placed in a container and subsequent to addition of zirconia beads, were dispersed by a paint conditioner. In this manner, the color filter colorants were prepared.
• a dispersant-free colorant for color filters was prepared by repeating the procedures of Example 13 likewise except that in place of 10.0 parts of the pigment composition (9), C.I. Pigment Red 177 was used in a proportion of 10.0 parts.
• pigments to which dispersants of the present invention had been added were used for the coloration of printing inks such as offset inks, various paints such as nitrocellulose lacquer and melamine alkyd paints, and synthetic resins such as vinyl chloride resin. In all of those applications, the pigments did not undergo flocculation and showed good dispersion properties.
• the dispersants of the present invention were also used for the production of dry and wet toners for electrophotography, ink-jet recording inks, heat transfer recording inks, inks for writing instruments, and the like, all of which recently require a high level of dispersion. In those applications, excellent dispersion was observed owing to the effects of the dispersants according to the present invention.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Dispersion Chemistry (AREA)
• Inks, Pencil-Leads, Or Crayons (AREA)
• Pigments, Carbon Blacks, Or Wood Stains (AREA)
• Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
• Paints Or Removers (AREA)
• Coloring (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=18541700

Family Applications (1)

Country Status (7)

Cited By (6)

Families Citing this family (12)

Citations (5)

Family Cites Families (5)

• 2001
  • 2001-01-12 EP EP01100740A patent/EP1118641B1/fr not_active Expired - Lifetime
  • 2001-01-12 ES ES01100740T patent/ES2179817T3/es not_active Expired - Lifetime
  • 2001-01-12 DE DE60100006T patent/DE60100006T2/de not_active Expired - Lifetime
  • 2001-01-16 US US09/759,330 patent/US6471766B2/en not_active Expired - Lifetime
  • 2001-01-18 KR KR10-2001-0002883A patent/KR100509226B1/ko active IP Right Grant
  • 2001-01-20 CN CNB011049375A patent/CN100392022C/zh not_active Expired - Lifetime
  • 2001-02-09 TW TW090100796A patent/TW538099B/zh not_active IP Right Cessation

Patent Citations (6)

Also Published As

Similar Documents

Legal Events